Buying a Used Samsung Note 4 - Any suggestions? - Galaxy Note 4 Q&A, Help & Troubleshooting

Hello,
I am going to be buying a used Samsung Note 4, specifically: N910W8.
Is there anything specific I should look for in terms of functionality, or common issues this device might have?
Thanks

insomnia9669 said:
Hello,
I am going to be buying a used Samsung Note 4, specifically: N910W8.
Is there anything specific I should look for in terms of functionality, or common issues this device might have?
Thanks
Click to expand...
Click to collapse
There are no common issues with the phone. However if you are buying used phone you have to look for these things:
Fist of all, if someone is selling his/her phone, find out the reason why selling, there might be 2 reasons, faulty phone or he/she is upgrading his/her phone.
Phone's Condition --> external condition (such as screen has scratches or side scratches etc.)
Camera: Check Camera is working fine - both front & back ( take some pictures)
Sensors: Check phone's sensor is working, some of the phone's sensors sometimes not working. For Screen / Sensor and other software related functionalities you can dial this number and check sensor, phone's color and screen, if broken internally or not. (*#0*#) - dial this from Samsung phone dialer.
Check Speakers are working fine, make call and check both the speakers.
Regarding Software related: it depends upon the ROM, which ROM you are running on your phone. If stock ROM, phone should be working fine, if he has ROOTED his phone and running custom ROM, then you will find some bugs in custom ROMS.
There are no such software related issues with all Note Series, they are awesome phone.
[*]Also, check if phone is repaired before or not ( you can open the back panel (battery door) and check the screws, if they have scratches then phone was opened and repaired.
Battery: Check the battery, I will tell you the procedure: take out the battery and put it on table & rotate it clockwise or anticlockwise, if it's not rotating, means battery is OK, if continuously rotating, it means battery dead, or about to dead, you need to replace it.
This is what I knew, & I have shared with you.
Good Luck!
_________________________________________
Press Thanks if you think it helps you!

gurbhasin said:
There are no common issues with the phone. However if you are buying used phone you have to look for these things:
Fist of all, if someone is selling his/her phone, find out the reason why selling, there might be 2 reasons, faulty phone or he/she is upgrading his/her phone.
Phone's Condition --> external condition (such as screen has scratches or side scratches etc.)
Camera: Check Camera is working fine - both front & back ( take some pictures)
Sensors: Check phone's sensor is working, some of the phone's sensors sometimes not working. For Screen / Sensor and other software related functionalities you can dial this number and check sensor, phone's color and screen, if broken internally or not. (*#0*#) - dial this from Samsung phone dialer.
Check Speakers are working fine, make call and check both the speakers.
Regarding Software related: it depends upon the ROM, which ROM you are running on your phone. If stock ROM, phone should be working fine, if he has ROOTED his phone and running custom ROM, then you will find some bugs in custom ROMS.
There are no such software related issues with all Note Series, they are awesome phone.
[*]Also, check if phone is repaired before or not ( you can open the back panel (battery door) and check the screws, if they have scratches then phone was opened and repaired.
Battery: Check the battery, I will tell you the procedure: take out the battery and put it on table & rotate it clockwise or anticlockwise, if it's not rotating, means battery is OK, if continuously rotating, it means battery dead, or about to dead, you need to replace it.
This is what I knew, & I have shared with you.
Good Luck!
_________________________________________
Press Thanks if you think it helps you!
Click to expand...
Click to collapse
Thank you! I too purchased a used note 4 on eBay. They are selling for cheap and being sold out very fast! I'll be looking at checking my phone with this list. Thx.

gurbhasin said:
There are no common issues with the phone. However if you are buying used phone you have to look for these things:
Fist of all, if someone is selling his/her phone, find out the reason why selling, there might be 2 reasons, faulty phone or he/she is upgrading his/her phone.
Phone's Condition --> external condition (such as screen has scratches or side scratches etc.)
Camera: Check Camera is working fine - both front & back ( take some pictures)
Sensors: Check phone's sensor is working, some of the phone's sensors sometimes not working. For Screen / Sensor and other software related functionalities you can dial this number and check sensor, phone's color and screen, if broken internally or not. (*#0*#) - dial this from Samsung phone dialer.
Check Speakers are working fine, make call and check both the speakers.
Regarding Software related: it depends upon the ROM, which ROM you are running on your phone. If stock ROM, phone should be working fine, if he has ROOTED his phone and running custom ROM, then you will find some bugs in custom ROMS.
There are no such software related issues with all Note Series, they are awesome phone.
[*]Also, check if phone is repaired before or not ( you can open the back panel (battery door) and check the screws, if they have scratches then phone was opened and repaired.
Battery: Check the battery, I will tell you the procedure: take out the battery and put it on table & rotate it clockwise or anticlockwise, if it's not rotating, means battery is OK, if continuously rotating, it means battery dead, or about to dead, you need to replace it.
This is what I knew, & I have shared with you.
Good Luck!
_________________________________________
Press Thanks if you think it helps you!
Click to expand...
Click to collapse
Thank you! I too purchased a used note 4 on eBay. They are selling for cheap and being sold out very fast! I'll be checking my phone out with this list. Thx.

test it with a sim and sdcard both inserted.
some note 4's may seem fine, but will suffer freezes, crashes, reboots, and boot failures when both cards are inserted because the motherboard is dying.

make sure you swipe it completely so you don't get busted with somebody else's dirty/illegal porn LOL

gurbhasin said:
There are no common issues with the phone. However if you are buying used phone you have to look for these things:
Fist of all, if someone is selling his/her phone, find out the reason why selling, there might be 2 reasons, faulty phone or he/she is upgrading his/her phone.
Phone's Condition --> external condition (such as screen has scratches or side scratches etc.)
Camera: Check Camera is working fine - both front & back ( take some pictures)
Sensors: Check phone's sensor is working, some of the phone's sensors sometimes not working. For Screen / Sensor and other software related functionalities you can dial this number and check sensor, phone's color and screen, if broken internally or not. (*#0*#) - dial this from Samsung phone dialer.
Check Speakers are working fine, make call and check both the speakers.
Regarding Software related: it depends upon the ROM, which ROM you are running on your phone. If stock ROM, phone should be working fine, if he has ROOTED his phone and running custom ROM, then you will find some bugs in custom ROMS.
There are no such software related issues with all Note Series, they are awesome phone.
[*]Also, check if phone is repaired before or not ( you can open the back panel (battery door) and check the screws, if they have scratches then phone was opened and repaired.
Battery: Check the battery, I will tell you the procedure: take out the battery and put it on table & rotate it clockwise or anticlockwise, if it's not rotating, means battery is OK, if continuously rotating, it means battery dead, or about to dead, you need to replace it.
This is what I knew, & I have shared with you.
Good Luck!
_________________________________________
Press Thanks if you think it helps you!
Click to expand...
Click to collapse
This is some great stuff! thank you very much.
thedicemaster said:
test it with a sim and sdcard both inserted.
some note 4's may seem fine, but will suffer freezes, crashes, reboots, and boot failures when both cards are inserted because the motherboard is dying.
Click to expand...
Click to collapse
Will do, thanks for the tip.
j_hansen said:
make sure you swipe it completely so you don't get busted with somebody else's dirty/illegal porn LOL
Click to expand...
Click to collapse
lmao.

One more thing, get bill & box along with the phone, if no bill then get any ID proof of the seller, to make sure that its jis phone not stolen one :laugh:

If you can try to see a grey or dark color background to see if there is any screen burn in

Joylesstuna said:
If you can try to see a grey or dark color background to see if there is any screen burn in
Click to expand...
Click to collapse
I'll check the phone using Pixel Test before buying for sure.
gurbhasin said:
One more thing, get bill & box along with the phone, if no bill then get any ID proof of the seller, to make sure that its jis phone not stolen one :laugh:
Click to expand...
Click to collapse
This one might be tough, I will try to acquire this. Thanks

Related

What problems to look for when buying a 2nd hand hermes?

I think this information might be useful for lots of people.
The question is: What problems should we look for when wanting to buy a second hand hermes, and how to look for them?
Everyone who's had problems with herms or knows about them should give an oppinion.thanks
Watch out for:
High frequent tone, ONLY when the display is on. Very annoying.
My phone has been to the shop for 3 times. Now I have got a new phone!
But I miss my HTC......
i had that one too, on the day i bought the 2nd hand tytn. changed the radio and rom and it went away. then the battery started heating, but i don't know if it heated before too
1). turn device on if you can.
2) sceen alignment and whitescreen - some people have the whitescreen problem, to see if it could be in yours(one type anyway) run your finger down to the bottom right at the side lcd screen (not on the screen, the casing) til you are about 2/3 of the way down from the top. lightly increase pressure and see if it starts going white. Please note this is a specific type of whitescreen which can be fixed BUT will have the warranty voided to do so. Try running a screen alignment (ask if FTouch flo is on the phone & active as this will stop this working and require a soft reset to fix)
2). test the buttons usually the bottom buttons ie. hotkeys, answer/hangup. but dont forget to check out the slideout keyboard too.
3). check to see if the battery gets hot or if there are any "hot spots" on the case. this indicates problems too. there may be a short somewhere on the hermes that is draining power REALLY quickly or may be affecting if power gets to where its needed.
4). soft reset and check if "no GSM" flashes up in the loading stage as this shows its a brick with a corrupted radio rom. this may be fixable but for me personally it would be bought only for parts (and would have to be cheap).
This is what I'd do as it is fairly quick BUT ths works only if you can see the device before you buy it otherwise you may be in for a nasty surprise.
Hope this helps...
hostedrage said:
The question is: What problems should we look for when wanting to buy a second hand hermes, and how to look for them?
Click to expand...
Click to collapse
While it's not exactly a problem, it could be a warning that problems may happen in the future.
Check the stickers under the battery, make sure the VOID sticker is intact and the (at least mine had one) reflective sticker is also intact.
Check the model and IMEI listed on the sticker, then compare it to the model and IMEI listed under the Identity tab in Device Information (Start -> Settings -> System -> Identity tab). This could give away someone trying to sell a HERM100 model as a new HERM200 (and asking a higher price), or a phone that may have been dropped and damaged. Also check the call duration tab if it's being sold as 'low use' (true, this can be cleared, but it's not exactly a couple of taps to do it).
At the very least, this could save the buyer some dosh and expose the seller as the potentially slimy person they are.
White screen mda vario 2
Hi,
I have purchased a mda vario 2, last november, with only 3 months waranty, now I`m having problems.
I have had my screen going white, some times if I go into landscape mode or turn the light on and off by means of pressing the power buton quickly the screen comes back, then the screen sometimes goes all blurry.
Now the phone wont come back on at all, all I get is this white screen, the screen lights up but just a white screen, nothing else.
So I bought a new screen from E-Bay and I connected it up to my phone but I get the same, the screen lights up, same old white screen.
Nothing else, If anyone knows what this problem is I would be very grateful.
It was a shop I brought the screen from off of E-Bay, I asked prior to purchasing this screen if it would be compatible with my phone and they told me that it was.
Many Thanks for any help, ideas what this could be.
Roy2008,
Not nice of you to hijack someone else's thread.
Anyway, read the following thread for information: http://forum.xda-developers.com/showthread.php?t=321163
li-ion have a limited number of hours before it dies i would check batt time of cause thats kinda problematic to test
I appologize if I hijacked someone else`s thread.
As I am new to this site I thought that you just use it like you do in a chat room.
I guess I was wrong, I`ll try to figure out how you use this site without annoying anyone.
My Appologies.
Anyways, Thankyou for your help, and for the hijacking part.
thinking of buying a hermes
I've been reading through out the forums because I am seriously thinking of buying this phone, a second-hand because I can't afford a brand new one. I'm a bit worried about the Whitescreen and D-pad failures thread, it seems it's the usual or maybe common problem of this model. So I have some questions before I do get this model.
-How would I know if the phone has been opened for repairs?
because I read here that you need to open the phone to fix the whitescreen prob.
-Do I look for one that has FTouch flo to check the screen alignment?
is there any other way to do this just in case the phone doesn't have one installed.
-How long does the battery last if you only use it for texting, wifi and making short calls? Also about the battery heating up, does it mean while it's idle? Is it sometimes normal for batteries to heat/warm up?
-ultramag69
sceen alignment and whitescreen - some people have the whitescreen problem, to see if it could be in yours(one type anyway) run your finger down to the bottom right at the side lcd screen (not on the screen, the casing) til you are about 2/3 of the way down from the top. lightly increase pressure and see if it starts going white. Please note this is a specific type of whitescreen which can be fixed BUT will have the warranty voided to do so
Are there other more ways to check if symptoms of whitescreen is present? I'd really like to be thorough because I'm pretty sure the ones that I can afford would not have any warranty anymore.
The ff. are the things I think I should do to make sure the phone is in good condition:
Make a call
Send SMS
Try wifi
Use the camera
Check all keys/buttons on the front, sides and dpad if all working
Bluetooth
Try a memory card
Pls. advice me if I've forgotten anything else.
I'm actually choosing between Hermes and HTC Elf, I'm leaning more to the Hermes because of the Dpad and it's slightly cheaper than the Elf.
Thanks in advance!
Also check the external speaker, I have four that I tweak, and two had loose speaker connections(made a good deal for me). It's an easy fix, I got the tool at radio shack. BTW these units are out of warranty.
Ok I'll add that.
Anything else?
Essentially a good indication of a possible whitescreen issue is the buttons on the front not working.
To check to see if its been opened look under battery as jdc said, theres a small white sticker over a screw on the right hand side thats says Void if removed, If can see a screw under the flash LED, then its been opened.
Cheers...

g1 camera messed up? IS it doomed?

Ok, jsut got this thing off of ebay, power it all up I notice someone has been inside. eh no real biggie.. I unlock it and test the major functions.. all works. Bring up the camera and holy crap its like looking through the eyes of a lawn gnome tripping off shrooms and acid.. take a look (attached)
I rewiped.. installed Fx Camera to see if it was a setting, and also wiped the memory card (which came with the phone.. cool!) I then turn around and see that the camera lens is cracked on the battery cover, however the lens inside looks pretty good. So, I'm thinking this is a hardware problem, but Im not afraid to try to fix it if its just a few dollars. Am I screwed?
whoah, thats a trip!
If you deem it to be hardware, I have a spare camera from a parted G1. PM if you want details
I may take you up on that, however I am searching google right now to see if you can even replace the CCD
The camera module is on a ribbon cable that attaches to the motherboard, easily removed. So long as the component damaged is not on the mainboard itself you should be fine.
That's what I like to see!
You have a PM
If you plan on taking it apart yourself you need to be extremely careful, i took mine apart to replace the case when i bought it and after putting it back together everything seemed fine but after a while the touchscreen kept dying the camera never worked and my signal dropped all the time, i tried taking it apart and putting it back together several times to no avail. The phone became unuseable and i shelved it for my D600... bad times. It was only until i was going to send my G1 to a phone recycle website that i opened it up one last time, after doing nothing different and putting it back together its for some reason worked ever since. Just a word of warning hope whatever you do works out ok - Adam
Thanks for the warning! Someone already has been in the camera before.. I am going to assume that it was to take a peak at the camera lens so I am not afraid of voiding the warranty. It's no new adventure for me, I have been inside multiple phones and other small electronics, but thank you again. It never hurts to be redundant when opening any electronic device.
PM returned
When disassembling, I like to modify the HTC manual a bit. I remove the back plastic, and the coaxial cables (be VERY CAREFUL when reassembling, they always get pinched!). Then, remove the connectors as instructed EXCEPT the camera. Now, lift the camera portion, as well as the IMEI sticker as a whole module. They are just taped down. When lifted up fully, now you can spin the mainboard out of it's hooks and remove the entire assembly. This was the difficult connection to the camera stays intact. Makes reassembling much easier too, as it will self align.
If you haven't read/downloaded the G1 service manual, you need to!
http://mikechannon.net/PDF Manuals/HTC Dream SM (A04).pdf
Whoa! My first phone that has a manual!
FTA:
"This document contains highly confidential information, so any or all of this document should not be revealed to any third party."
HAHAHAHA!
h1p1n3 said:
Ok, jsut got this thing off of ebay, power it all up I notice someone has been inside. eh no real biggie.. I unlock it and test the major functions.. all works. Bring up the camera and holy crap its like looking through the eyes of a lawn gnome tripping off shrooms and acid.. take a look (attached)
I rewiped.. installed Fx Camera to see if it was a setting, and also wiped the memory card (which came with the phone.. cool!) I then turn around and see that the camera lens is cracked on the battery cover, however the lens inside looks pretty good. So, I'm thinking this is a hardware problem, but Im not afraid to try to fix it if its just a few dollars. Am I screwed?
Click to expand...
Click to collapse
My phone just started doing the same thing. I flashed the ADP image to see if it was a bug with the ROM I was using, only to find that it was still all crazy looking. Contemplating if I should try the repair or warranty exchange my phone again, ugghh
mine's doing the same suddenly, according to this: http://www.fixya.com/support/t2307654-htc_g1_camera_takes_pictures_messed_up
it's called solarization but how does one turn it off without a hard reset?
I downloaded the Snap Photo app which allows turning solarization on or off but it makes no difference
Any know how to fix this?
starting to look less and less like hardware
Anyone know how to switch this back to normal?
Hate to say it, but I do not see anything that would point this to software. First, if it was a setting or something software related, it would be resolved by the factory reset.. Heck, flashing the rom like JackSlim did would have reset any bad stacks or drivers.
I did find that post by fixya initially and quickly dismissed when I noticed that 1. Fixya blows... 2. there was no resolution 3. this is the same behavior that digital cameras get when the ccd or cmos goes bad..
PLEASE correct me if Im wrong, I would rather be
h1p1n3 said:
Hate to say it, but I do not see anything that would point this to software. First, if it was a setting or something software related, it would be resolved by the factory reset.. Heck, flashing the rom like JackSlim did would have reset any bad stacks or drivers.
I did find that post by fixya initially and quickly dismissed when I noticed that 1. Fixya blows... 2. there was no resolution 3. this is the same behavior that digital cameras get when the ccd or cmos goes bad..
PLEASE correct me if Im wrong, I would rather be
Click to expand...
Click to collapse
After reading the post of Fixya I went into Camera Magic and played with some of the setting and couldn't change it back to normal
Unrooted my G1 today, back to stock Donut DRC83, still the same issues, so I'm pretty sure it's not software related. Since I've had the same issue on the latest Cyanogen build, the Android Dev Phone build & the stock Donut build.
Called T-Mobile to get a warranty replacement, so I'm $9.99 and a couple days away from having another phone.
That's my fix anyways
I hope anyone not covered under a warranty is able to find a solution, my guess is you would have to replace the camera itself as Speed mentioned in one of the earlier posts, so look for a parted out phone or a aftermarket parts store and good luck with opening up the phone
As soon as money goes into my paypal account and I replace it I will post my results. Heck, if anyone is interested I will do a step by step for future reference. With pictures taken from a working camera, of course.
The only reason I am thinking software is that it seems like it is occurring to a few people all of a sudden where a week ago none of us had heard of this. I had a accelerometer problem with a G1 and I took it back to the RC29 rom and everything trying to fix it, it never would work. Sent it to HTC and they reflashed it...worked fine. They said there were no hardware issues. That makes me think there must be a bit of software that isnt getting replaced (like bios on a pc?). Perhaps what is going on is hardware..just hard to say right now.
The camera itself may have some firmware that is corrupted. Also possible that there's a fried transistor somewhere along the line. Could even be something really simple, like a bad ribbon cable or connection.
Cheers for Manual link
will greatly help when I swap over from black case to white case
( sticky keys and a mate wanted white one sooo $30 AUD for an complete white kit and hoping for sucsessfull fixed KB glitch )
note that you will still have black buttons for volume and camera, as well as memory card cover. That is what kept me from changing colors on mine- I went with a black replacement case so I didnt have the wrong colored buttons

[Q] Need help with screen

Ok so basically I love the g2, but here is my problem, bare with me on this haha, BTW its completely stock n everything as its my 1st Android phone so didn't want to mess with it. So basically I broke my phone screen in January, bought new screen, followed a YouTube tutorial, replaced LCD+touchscreen, no issues super happy, had the odd issue where if I woke screen, would only be on for a second n then go back to sleep, but then upgraded to KitKat through computer software update, still nothing wrong, upgrade fixed the issue with the knock to wake, and then my worst day, smashed the screen again! On good Friday, ok I thought I'll just replace screen again, so I did, but when I put new screen on and tested it, all was well, until I made a phone call, the instant moment I press green call button, screen goes blank and won't come on no matter what, power button don't bring it back on or end the call, but I can hear the other person and they can hear me, had to turn phone completely n back on to be able to use it again, so I though hmmm dodgey screen, but just to be sure it wasn't the phone I put damaged screen back on, and the issue didn't appear, stayed lit up while in my hand, went off next to my ear, back on whole in hand, so I took it to local phone repair shop because I couldn't be bothered going through the hasstle getting refunds etc, they replaced screen, I went and tested it before paying them, guess what, same problem, so what exactly is going on? Has KitKat made the phone not work with a new screen other than the one I upgraded it with? I'm seriously confused and need some bodies help urgently my model is an unlocked lg g2 d802 16gb now I turned it on last week before I took it to be repaired, and it says I have software updates but I didn't bother installing them, is there a chance these could be related to my issue and possibly fix them? Its driving me nuts tbh
Chris
Hey Chris. It seems like your proximity sensor is messed up. I think the new screen you got yourself is worse quality or your damaged the proximity sensor when installing the screen.
Edit:
Please go into your phone app (where you call people) and type the following
3845#*802#
Then go into: HW Device Test and then ALC proximity test. Try testing your proximity sensor with your hand. It should change from far to near when your hand is about 2 inches from your phone. The proximity sensor is located next to the camera.
Sent from my LG-D802 using XDA Premium 4 mobile app
Ok thank you I will try that, I also thought a damaged sensor but when I put damaged screen back on after having the issue with my new screen it worked just fine, no blank screen when making a call, I retested it before I left it at phone repair shop, still was fine, then picked it up with a new screen and issue came back, I don't get why its been like this, I'm thinking bad quality screen and maybe try scratching the sensor area of the new screen to allow more light in? It may be to dark for it, what exactly do I do if it works fine when using that code, try another screen?
Chris
I doubt it will work when you use that method. It's just to make sure that it's the proximity sensor that's the problem and not some loose connection. And yes, a new screen would be your best bet.
Sent from my LG-D802 using XDA Premium 4 mobile app
Ok I won't try that method then lol, what if it doesn't work when I use that code, as I said I didn't have the issue with the damaged screen which I tested after having the issue with the replacement screen I'd purchased, so how do I know its not just the screen not allowing the sensor to see? Is there anyway I can reset the sensor to relearn maybe?
Chris
If you follow my steps, nothing bad will happen. It's just a way of troubleshooting the proximity sensor. I still think you should do it.
Sent from my LG-D802 using XDA Premium 4 mobile app
Ok I've spoken to phone repair shop and they agree it worth a try to see if its the screen or not, I'll let you know on Saturday after I've been and tested it
Chris
I just had this exact same issue.Turns out the inside of the screen was just dirty. I opened it up and took a q-tip to the inside of the screen and it worked perfectly after that. Also check the readings of the light sensor, as it is right next to the proximity sensor, if the screen is the problem it will likely have low readings as well.
Great I'm glad somebody else has encountered this issue, its been driving me nuts lol ok so I dial in the code that's been mentioned and what are the labels in the menu for the proximity and light sensors? I'm thinking its just a crap screen as the broken 1 worked fine after I put it back on after testing new screen, and I reckon the screen the repair shop has used is also ****e quality, but I just want to cancel it all out as I don't have the phone to hand to inspect as they still have it lol is there a picture somebody can post up to show what to not cover when replacing the screen and applying adhesive tape etc? Just so I can show them to make sure they have done it all properly.
Chris
Ok so just to update the problem, I went to the phone shop today, did the test, it was showing near all the time, but the light sensor reading was quite high, 166 or something, but I then tried squeezing the screen, index finger on back and thumb on front, gently squeezed it, and proximity sensor started showing far, and near as I moved my hand over it, but after few seconds, went back to showing near constantly, so I think its the screen not been seated, told the shop to take screen off, give it a good clean and reseat it. This sound good to you guys?
Chris
Anyone?
Bump! I'm only wanting a little extra advice so I don't end up paying more money out for another screen when it could possibly be proximity sensor? I think it was just the screen not seated properly, anybody have an idea or something else to either assure my choice or point me in another direction?
Chris

[Q] Can I use the Note 3 motherboard without digitizer plugged.

Dear all,
I've performed an exhaustive search all over internet and in particular in XDA developers site and I could not find any information.
First some background just for info:
We are an amateur group that launches high altitude balloons to the stratosphere. There we take photos, videos, we measure temperatures, accelerations, pressure... (I guess it is quite known the HAB activities). Apart from other equipment’s (arduino based) and payloads, we always send an android phone as a recovery system as we can send an sms to the phone to ask its gps location. We also takes some photos during the flight with the phone camera and record GPS, the accelerometer and gyro data.
We would like to save some mass (to reach higher altitude) so we are thinking to launch only the motherboard and the battery. I have tested it with my galaxy S2: I opened it, extracted only motherboard (usb included) and battery (with no screen at all) and I could switch on, and operate it through MHL (hdmi) and a bluetooth mouse.
So we decided to buy a second hand galaxy note 3 (better camera resolution, battery, more sensors...) with a broken screen as no needed.
The note 3 works perfect with the screen attached again via mhl (even though the screen was not working). BUT when I remove the screen, the phone cannot be switched on... it enters and endless bootloop.
I guess that this is because the boot process checks somehow the presence of the screen.
Now the real question:
Do you know if there is any method to use the phone without the digitizer plugged?
Maybe replacing or reconfiguring the boot/kernel/rom to avoid the screen check? No problems at all with voiding the warranty (is a destroyed second hand device) or rooting, or flashing...
Many thanks!
Blunder
p.s. Sorry for my bad English
blunderbrain said:
Dear all,
...
Now the real question:
Do you know if there is any method to use the phone without the digitizer plugged?
Maybe replacing or reconfiguring the boot/kernel/rom to avoid the screen check? No problems at all with voiding the warranty (is a destroyed second hand device) or rooting, or flashing...
Many thanks!
Blunder
p.s. Sorry for my bad English
Click to expand...
Click to collapse
I know this is not what you are asking (which is interesting in itself) but why don't you leave the digitizer plugged? It should be like just 1mm or so, and only a few grams.
Maybe this is unclean workaround: how about let the phone completely booted and remove the digitizer?
I would suggest disabling the digitizer and/or display in a custom kernel build first -- if you can get the device to still boot fully, you can try removing the hardware connections. If it doesn't boot, then you need to figure out what in the OS relies on these features.
I know this is not what you are asking (which is interesting in itself) but why don't you leave the digitizer plugged? It should be like just 1mm or so, and only a few grams.
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Click to collapse
Thanks xclub101
Our workaround is indeed that one, to remove everything appart from the digitizer (frame, glass, wacom...). But we also thinking in volume reduction that also impacts weight. Considering that we are tipically launching 500g, 50g is 10% that in terms of balloon ceiling could be 3 or 4 km (not that much, but in any case above our actual limits).
In any case, I do not want to diverge from the original question. That is to use the phone without the digitizer.
Maybe this is unclean workaround: how about let the phone completely booted and remove the digitizer?
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Click to collapse
Thanks Crescendo
Yes, it could be a solution, I will try to do it. However, once integrated within the payload, it could be not so easy to remove it.
And what would happen if there is a reboot during the flight? (sometimes it happens, mainly due to failures in the battery as a consequence of the cold temperatures up there, almost reaching -50ºC). Then the phone wont boot again
I would suggest disabling the digitizer and/or display in a custom kernel build first -- if you can get the device to still boot fully, you can try removing the hardware connections. If it doesn't boot, then you need to figure out what in the OS relies on these features.
Click to expand...
Click to collapse
Thanks jisoo
Sounds a good solution, but I'm not an expert in kernel customization, nor cooking... If you (or any other) could guide me in how to do it I could try.
Thanks again

Battery staus randomly change with 5.0.2

Hi to everyone, i bought from internet second-hand Nexus 4 with 5.0.2 but after a couple of day i got a very strange problem:
The battery % randomly change.
I mean, i am normally (but it happen also in standby) using my N4 when it alert to me that the battery is out.
It pass from 40% (or whatever good %) to 4,5 sometimes 1 and then shut down.
Also, i noticed that sometime i can't find "battery" icon in the option menu.
So i try to rebooth the phone but the touchscreen doesn't work and i need to tap with 2,3 or 4 finger.
When i reboot again, it work but they % keep changing, sometime in a bigger number, sometime in a lower number.
I complete wipe and format my N4 and for 2 days works in the best way, the battery keep the load and so on
but then, here we are again.
I got a couple of screenshot of the battery icon missing in the option, of the % changing but it is very hard make a video of this becouse it happen randomly.
Android is 5.0.2 stock, no root, no bootloader
Ofc the guy that sell to me said the phone was perfect, no problem and all the stuff works good.
it the first time it happen to me..
Please help me if you can becouse i really don't know how to behave.
Many many many thanks, Federico.
Is there any noticeable bulge to the battery on the rear of the unit? It sounds like a hardware battery issue.
So, it can be a hardware problem?
Yesterday my battery long last For about 24h...
Maybe a problem in the socket.
I should open the phone (battery is not removibile, so i dont know if there is any bulge)
I dont nave many experience with hardware problemi so i cannot spot them.
I Also should take a look in the hidden menu and take note of the mV.
Sorry for my english..
I try to find the mini torx and open my phone asap.
Thank you!
I replaced my battery the other day while replacing the power button. I didn't have an issue with the battery but figured it couldn't hurt. Turns out the replacement brand new OEM battery built 3 months ago is lasting exactly the same as the original 2 year old battery.
The battery is a really easy job to do though. You could try removing the screw's holding the connector on. They've been known to cause problems for some people.
Sent from my Nexus 4 using XDA Free mobile app
Big Edit!
i finally open the device ( i missing the TR5 Torx!) and i come across in some funny surprise!
First of all, the battery was covered by paper label
Then you can see the antistatic blue tap broken
No glue is present between battery and device
The two little screw on the connector is missing <- may be the major cause?
For sure, the battery was tampered and that may be the cause of my problem.
Just one question: there is a way to understand if the battery is original ?
Special thanks to:
added info
Ah, it does indeed seem like it was tampered with, especially with the defects in the top right corner and such. Unfortunately I don't think there is a way to see whether it is original or not, but now I definitely recommend purchasing a new battery, as well as some of the extra components that seem to be missing.
Thank you for support.
By the way, i found in my office two screw that fit in the hole so i am ok, i can use a little drop of a glue or a particular biadhesive tap for block the battery in the status.. other stuff seems to be ok.
Alright, sounds good.
It looks identical to the original and the oem replacement I put in. Judging by the date it is probably not the original.
Hopefully mine doesn't act up because of leaving the screws out. I only did it because of the number of people claiming it was a fix.
I didn't put any paper on top of mine however. That makes me think the previous owner had an issue they were trying to fix with it.
Sent from my Nexus 4 using XDA Free mobile app
I searched the internet images and looks very similar to the original , in fact when don't show this defect has a great autonomy !
The label,i think it's been done by the past owner to obtain a thickness and hold down the battery in position , you can since it lacks the glue on the back .
The real problem is : may be due to the fact that the missing screws let "move" the connector and generate the defect ?
Moreover, the battery sends a lot of information on the phone , not only the + and - .
even just a little contact property can generate defects .
I Really hope.
I order a new battery and i have some screws taken from old laptops, mobile, maybe i can fit two of them (the first i found was too long)
The boy agreed only to refund the value of the battery ( claimed to know nothing , honestly , I do not believe but that's another story)
Sorry but i don't understand this phrase:
"Hopefully mine doesn't act up because of leaving the screws out. I only did it because of the number of people claiming it was a fix. "
You meant some people leaving the screws away from connector ?
Many thanks to all, Federico.
I mean that when I replaced the battery while I was replacing the power button, I left out the screws because so many people claimed they were too tight and caused the red light of death problem. Since I didn't want that to happen to me I left them out. I did keep them in case I had a problem so o can put them back in but so far everything is working fine.
Sent from my Nexus 4 using XDA Free mobile app
That doesnt sound good for me
Maybe try putting some in again but not too tight.
Sent from my Nexus 4 using XDA Free mobile app
I just pur two screw and hold the battery.
Same behavour.. Hoping is a sort of bug in the battery
Must be. My 2 year old battery lasted just as well as the new one. Held up really well.
Sent from my Nexus 4 using XDA Free mobile app
I hope man next week should be to my home!
Exactly same Problem!
Facing the same problem here. phone blanks off at 40%. Could be because of 5.0.2 as problem appeared around the time I upgraded to 5.0.2. Could be a hardware issue too as I changed the battery myself.
Edit- Loose connector is not a problem as battery charges from 0% after the phone switches off. It is either a problem with the battery or with the battery status sensor.
where is locate the battery status sensor ? in the battery or on the phone ? i try to find something on internet but...
Edit:
Just noticed that my n4 is not complete clear. Files from twrp are inside. I need to totally clear my n4 before keep testing
Well, today update:
First of all, i tried to turn on a lot of "nerdy" stats using the developer menù in order to understand if something of strange happening,but nothing of strange attract my attention.
I also turn on the thing that you can see your tap on display in order to understand is just a software problem, but actually when touchscreen does not respond, doenst respond.
Then i totally wipe my N4 (following a tutorial found on XDA) flashing kernel, radio, bootloader and stock 4.4.4 and that is what i can say:
1. "Battery" in "Options - Device" isnt shown.
Very strtange imho but that make me hopefully, maybe the origin of the problems is located on battery according with what you say.
2. I am unable to boot my N4 pressing Power button! (Actually that happen also with lollipop).
I need to turn on the device passing through fastboot menù, not a big problem but a little bit annoying .
3. Touchscreen seems to work.
Nothing to say
I will test the phone today and tomorrow.
As ever, thank you for all and the support!!
Federico.
EDIT of EDIT
1A. Rotating the device and switching from landscape to portrait battery icon shown in options.
That can be an hardware problem.
It is very hard to replicate but....
---
That must be an hardware issue, becouse tilting my device battery icon (and the orignal problem) shown.
Now i hope that is locate in the battery connector instead of device connector...

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